Relieving



Jan. 27, 1931. F. o. HOAGLAND RELIEVING MECHANISM FOR LATHES Filed April 11, 1928 2 Sheets-Sheet 2 Patented Jan. 27, 1931 onrrso srarrs earner!" orrics FRANK 0. I-IQAGLAND, OF HARTFORD, CONNECTICUT, ASS IGNOR TO PRATT & WHITNEY COMPANY, OF FIE-VJ YORK, N. Y., A CGRPORA'IION OF NEW JERSEY RELIEVING MECHANISM FOR LATHE$ Application filed April 11,

provide relieving mechanism for a lathe adapting a lathe tool on the cross slide of an. axially movable lathe carriage to effect re.

10 lieving movementsof the tool either radially directly toward and from the axis'o-f rotation of the lathe spindle, in a direction parallel thereto, or in any oblique'direction relative thereto. 7

One feature which enables me to accomplish the above named object is that two relieving cams are mounted forrotation in the lathe, each being rotatable from and in timed relation to the rotationof the lathe spindle. 'One of these cams is adapted'to move the lathe carriage in a direction parallel to the axis of the lathe spindle and the other cam is adapted to efiect movements of the cross slide on the lathe carriage in a direction normal to the axis of the lathe spindle.

Another object of the'invention isto provide means to simultaneously efiect axial movements of the lathe carriage and movements of theecross slide normal to the lathe spindle so that oblique movements of a tool on the cross slide may be efiected while the work is being rotated. 7

With these and other objects in view my invention consists in the features of construction and operation set forthin the following specificationv and illustrated in the accompanying drawings. In the accompanying drawings annexed hereto and forming a part of this specifica- 40 tion, I have shown my invention embodied in a tool makers lathe, but it will be under stood that the invention can be otherwise embodied and that the drawings are not to be construed as defining or limiting the scope of the invention, the claims appended to this specification being relied upon for that'purpose.

In the drawings z Figure 1 is a rear elevation of a lathe provided with the present invention.

1928. Serial No. 269,048.

Fig. 2 is a plan View of a complete lathe provided with the present invention, parts being broken away to more clearly show their 7 construction.

Fig. 3 is a side elevation in section of the lathe taken upon the line 33 of Fig. 2.

Fig. 4 is ahorizontal sectional view ofa portion of the mechanism shown in Fig. 2.

Fig. 5 is a transverse sectional view taken upon the line 55 of Fig. 4, and

F ig. 6 is a sectional view of the parts shown in Fig. 5 taken upon line 66 thereof. 7

In the above mentioned drawings 1 have shown but one embodiment of the invention which is'now deemed preferable, but it is to be understood that changes and modifications may be made within the scope of the appended claims without departing from the spirit of the invention.

Briefly, and in its broadest aspect, my'invention comprises the following principal parts: First, a base; second, a headstock mounted at one end thereof; third, a Work supporting and rotating spindle rotatably mounted in said headstock; fourth, a' carriage .slidable on the base in a direction parallel to the axis of rotation ofthe spindle;

fifth, a tool slide on said carriage slidably movement in a direction parallel to the lathe spindle; ninth, means connecting this member to the lathe carriage so that reciprocatory sponding movements of the tool carriage; and tenth, driving means for rotating the second cam preferably connected directly to the driving. means for the first cam so that the two cams may be simultaneously rotated at the same speed.

Referring more detail to the figures of movements of the member will induce corre- 2; messes the drawings, 1 provide a ass having mounted thereon a headstock 1 within which is mounted for rotation i may he mounted on 1 at one end of the spit t means of the face p Also on the base 10is t adjustable to steel; serving to support ti for rotation. Slide. i 7 base 10 on guidewa arriafg'e 18. 11s carr s e lethes. moves in a direc' J. l. of ion of on i angles carr:

23.;15 no worn T 1 are, or

may be. sinn i found in thought i t i ususllv lathes o't meditct .ry. there construct oi the ca more in detail course, that on 19 is a compound 5 of which a tool I V H and from the arts of: l'OlIStlOll oi: the soindle 12.

In order to e'tl ect relievingmovements 0' the cross slide 19 on the carriage 18, 1.1ean may be provided in way simiiar to the disclosed in the patent to Lindstrom L516; granted November 18 1925. By these mes. relieving; cam shown in Fig. 2 as having four lobes, contacts wi' roller 26 carried by the slide 18 a is rear end and actuates this slide 18 transversely ot' the hose 10 while the cam leing const rota ed. In order to rotate the cam driving co inections are prorioed for telescoping shaft 528 shown clearly in F 11's. 1 and 2. These driving connections 2. are connected to the headstock spindle l2 and shown in id in: 2 compi se change gears. One end of this telescoping shaft 538 is attached to a shaft :29 mounted in rear of ear'f 18 on which is mounted the ca 111 The i lieving' cam 25, therefore, ill. be rotat d in L" l I) 1- t in yin l tnneo icia-ion to he it. Mien or Ll. supporting and rotating spindle 19. at an predetermined reletion. By enga the roller 26 with t 1e cam the tt be advanced tower spindle 12 a. plural; .c rotation of the snindle. ratio or. gearing; 1n the GIN/E15,; connec-oaons 2! or the number of lohes on the cam the number of reciprocatory movements of th tool 21 may be widely varied for each iotation 01 the work W. its the cam 25 and its drn me ns ant. the actuating; means for the it? operated thereby may as ieei'itical with the mechanism shown and described 111 the above mentioned patent, further description thereof is thought to be unnecessary.

Mounted on the shaft 29 carrying the cam above described is a gear 30 preferably frictionally driven thereby. mesh with a 31 of similar her on sha parallel to the cam shaft a at its opposite and, is con- This sh nected to one member of the telescoping shaft the opposte member oif which is attached to a short horizontal shaft 34; rotatably lixracket 35 adapted to be face of the lathe base 10. of spiral gears 36 and 33" this mounted mounted within. a bolted to the rear me;

any

sh ti rotat I :actly t cam Adapted noted by the cam 39 and to Ly therewith is one :N 1 n1 -1 or a gjtlu; ul. ioile no; wont 1y silo.-

mher -11 sl .ed in the bracket Jovement 75 il horizontally will manner prose: o be describe l is a rod the opposite end of winch 1s threzulet and adapted pass through a pro hraclzet formed Nuts ene'aai rod. 42 are edit: of the projection 43 on the lathe c2 rriage It will be rocate the lathe carriage 18, these movements of the :arriag e being; lntimed relation to cam 25 and the the slide 19. s. 4 and 5 it will he the rotation attached to a slide L5 morahie o the slide ll on which the Q the cntric nin st; in a stud i-o moun In one position of the ll and may he changed.

roller upon one sioe of the cam cam 59.

adaotecl to he compri e these sprino's 49 the normal oosi rection by the can 39 and one 01 the rollers andle 18 to an intermediate position neither of the rollers 40 will Rotation of the cam 39 in the instance will not effect the movement &0. By moving the .1

J1 engage (HG cam 39.

1s gear 30 is in tooth numcan 39. The d firms; connections t 238 ar at am 39 will s eed as the first h the rotations of cam Nichol to this slide 41, in a tQa'l to usage opposite faces LU. seen from the above therefore, that rotation of the second cam 39 will recipse n.

l roller 1 no. e

cam 39 is mounted. c s 41 and are connected by means By rotating the stud 48 as by handle 4-8 the relative positions slides 4:1 and tl'a 4 km C of the rod 42 but the slide 18 will remain immovable. r

What I claim is: I 1. A relieving mechanism forlathes comprising in combination, a base, a headstock,

a work supporting and rotating spindle therein, a carriage movable along said base,

a tool slide movable on said carriage in a direction normal to the axis of said spindle, a spiral cam for actuating the carriage, a spiral cam for actuating the slide, means driven from said spindle for simultaneously rotating said cams at the same speed, and means to render one or both of said cams inoperative whereby either cam may be used singly or both cams may be used in combination.

2. A relieving mechanism for lathes com-' prising in combination, a base, a headstock, a work supporting and rotating spindle therein, a carriage movable along said base, a tool slide movable on said carriage in a direction 7 normal to the axis of said spindle, a cam rotatably mounted on said base for actuating the carriage, a cam rotatably mounted on said 7 carriage for actuating theslide, connections between said cams and said carriage and slide in, a carriage movable along said base, a'tool slide movable on said carriage in a direction normal to the axis of said spindle, a cam driven from said spindle and adapted to actuate said slide toward and from the axis of said spindle in timed relation to the rotation thereof, a second cam driven from said spindle and adapted to actuate said carriage axially of said spindle and in timed relation thereto, and connections between said cams and said carriage and slide respectively'for imparting relieving movements in either of opposite directions.

In testimony whereof, I hereto affix my signature.

. FRANK o. HOAGLAND.

res ectivel for im artin relievin move y b b ments in either of opposite directions, and means driven from said spindle for simultaneously rotating said cams in timed relationto the rotation of said spindle.

3. A relieving mechanism for lathes comprising in combination, a'base, a headstock, a

'work supporting and rotating spindle therein, a carriage movable along said base, a tool slide movable on said carriage in a direction normal to the axis of said spindle, spiral cam means driven from the spindle to reciprocate the carriage axially of said spindle in timed relation to the rotation thereof, means simultaneously acting to reciprocate said slide in a direction normal to the axisof the spindle in: timed relation to the rotation thereof, and

said spindle and adapted to actuatesaid carriage axially of said spindle and in timed relation thereto, and connections between said cams and said carriage and slide respectively for imparting movements in either of oppo-- site directions.

5. A relieving mechanism for lathes comQ prising in combination, a base, a headstock, a

work supporting and rotating spindle there- 7 

